Entity that is able to carry out action.

Usage: In compliance with the description from FOAF, an Agent is considered as any entity that is able to carry out actions. The Agent class acts as a generic element which can be further specified by implementers for their usages, for example by defining the Person class from the Core Person Vocabulary or Organization from W3C's Organization Ontology as subclasses of Agent. This Person or Organization can then issue a certain Requirement or be concerned by an Evidence provided.